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2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL WITH V.35 OR X.21)

Figure 4-3. Connecting the Line Driver to a V.35 serial DCE.

4.3 Connecting the Line Driver‘s X.21 Serial Interface

The Line Driver supports X.21 serial port connections. This section describes how
to connect the serial ports to your X.21 equipment.

4.3.1 C

ONNECTING THE

X.21 L

INE

D

RIVER TO A

DCE

OR

DTE D

EVICE

The Line Driver provides an X.21 interface on a DB15 female connector. The X.21
interface default configuration is DCE (Data Circuit Terminating Equipment) for
connection to DTE (Data Terminal Equipment), such as a router. However, the
X.21 interface on the Line Driver may be configured as DTE (Data Terminal
Equipment) for connection to DCE, such as a modem or multiplexor. When
connecting the X.21 interface of the Line Driver to your DTE device, use a X.21
straight-through cable (see Figure 4-4).

Figure 4-4. Connecting the Line Driver to a X.21 DTE or DCE.

Crossover M/34

cable

DSL span

V.35 multiplexor (DCE)

HDSL Line Driver (ME0006A-V35) (DCE)

Remote HDSL Line

Driver (ME0006A-V35)

Straight-through

DB15 cable

DSL span

Router (DTE) or

Multiplexor (DCE)

HDSL Line Driver (ME0006A-X21)

(DCE or DTE)

Remote HDSL Line

Driver (ME0006A-X21)

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Содержание ME0006A-V35

Страница 1: ...chnical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com NOVEMBER 2001 ME0006A V35 ME0006A X21 2 Wire Short Range DSL Line Driver HDSL with V 35 HDSL with X 21 ...

Страница 2: ...equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This digital apparatus does not exceed the Class A limits for...

Страница 3: ...l fabricante 7 El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación Todo otro servicio deberá ser referido a personal de servicio calificado 9 El aparato eléctrico debe ser situado de tal manera que su posición no interf...

Страница 4: ...r una antena externa deberá ser localizada lejos de las lineas de energia 16 El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación 18 Servicio por personal calificado deberá ser provisto cuando A El cable de poder o ...

Страница 5: ...4 2 WIRE SHORT RANGE DSL LINE DRIVER HDSL WITH V 35 OR X 21 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners ...

Страница 6: ...r to a DCE Device 15 4 3 Connecting the Line Driver s X 21 Serial Interface 16 4 3 1 Connecting the X 21 Line Driver to a DCE or DTE Device 16 4 3 2 Opening the Case 17 4 4 Connecting Power 18 5 Operation 19 5 1 Power Up 19 5 2 LED Status Indicators 19 5 3 Test Modes 20 5 3 1 Overview 20 5 3 2 Restart Procedure and Timeouts 21 5 3 3 Loops and Patterns 22 5 3 4 Using the V 52 BER Test Pattern Gener...

Страница 7: ...TD yellow green idle yellow RD yellow green idle yellow NS red active No signal DSL Link ER flashing red CRC error during normal operation bit error during pattern generation test TM active yellow Test Mode enabled Configuration Externally accessible DIP switches or SNMP managed through ME0003C Transmission Line Single twisted pair Line Coding 2B1Q Line Rates DSL Line 144 272 400 528 784 1040 1168...

Страница 8: ... management capabilities through a DSL Line Driver Rack Card ME0003C CO and externally accessible configuration switches Both versions of the Line Driver are compatible with the popular QuikConnect HDSL Line Driver ME0007A HDSL standalone and DSL Line Driver Rack Card ME0003C as well as the HDSL Line Driver 10BASE T ME0006A 10BT As a symmetric DSL NTU the HDSL Line Driver offers the same data rate...

Страница 9: ...grouped into two eight switch sets They re externally accessible from the underside of the HDSL Line Driver see Figure 3 1 Figure 3 1 Underside of the HDSL Line Driver showing the location of the DIP switches The two sets of DIP switches on the underside of the HDSL Line Driver are called S2 and S3 As Figure 3 2 shows the orientation of all DIP switches is the same with respect to ON and OFF posit...

Страница 10: ... DTE Default settings are shown in Table 3 1 Table 3 1 S2 summary Position Function Factory Default S2 1 Reserved Off S2 2 Reserved Off S2 3 Reserved Off S2 4 Reserved Off S2 5 Reserved Off S2 6 Clock Mode On S2 7 Clock Mode Off S2 8 Enable loop from DTE Off Disabled Switch S2 1 S2 2 S2 3 S2 4 and S2 5 Reserved for factory use and must remain in the OFF position Receive Recover ...

Страница 11: ...ne Off Off Reserved Switch S2 8 Enable Disable Loop Tests from DTE Switch S2 8 may be used to allow the HDSL Line Driver to enter loopback diagnostic tests Local or Remote when the V 35 DTE raises the appropriate loop request pin LLB Pin L or RDL Pin N When Switch S2 8 is in the On position the HDSL Line Driver will enter local loopback or remote loopback at the request of the DTE When Switch S2 8...

Страница 12: ...te On S3 7 Reset Software Defaults On Normal Operation S3 8 Transmit Data Sample Point On Normal Operation Switches S3 1 through S3 6 DTE Bit Rate Table 3 5 DTE bit rate S3 1 S3 2 S3 3 S3 4 S3 5 S3 6 DTE Rate kbps Off Off On On On On 64 On On Off On On On 128 Off On Off On On On 192 On Off Off On On On 256 Off Off Off On On On 320 On On On Off On On 384 Off On On Off On On 448 On Off On Off On On ...

Страница 13: ...n of the DTE rate To see the line rate associated with various DTE rates refer to the distance charts in Appendix C Switch S3 7 Reset Software Defaults Switch S3 7 allows you to reset the software configured factory defaults This will only be needed when using the Managed Micro Rack SNMP HTTP Card part number RM261C SNMP to SNMP manage your units For more information please refer to the Managed Mi...

Страница 14: ...Data TD Sampling Point Table 3 7 Transmit data sampling point S3 8 Setting Description On Normal TD sampled on the falling edge of the HDSL Line Driver Transmit Clock TC Off Invert TD sampled on the rising edge of the HDSL Line Driver Transmit Clock ...

Страница 15: ... Driver needs one twisted pair of metallic wire This twisted pair must be unconditioned dry metallic wire between 19 0 9 mm and 26 AWG 0 4 mm the higher number gauges will limit distance Standard dial up telephone circuits or leased circuits that run through signal equalization equipment or standard flat modular telephone type cable are not acceptable IMPORTANT The HDSL Line Driver has been optimi...

Страница 16: ...ing or constructing an interface cable please refer to the pin diagrams in Appendix A as a guide Figure 4 2 Connecting the Line Driver to a V 35 serial DTE 4 2 2 CONNECTING THE V 35 LINE DRIVER TO A DCE DEVICE The Line Driver provides a V 35 Data Circuit Terminating Equipment interface on an M 34 female connector As a DCE this interface is designed to connect to DTE equipment such as a router Howe...

Страница 17: ...ata Circuit Terminating Equipment for connection to DTE Data Terminal Equipment such as a router However the X 21 interface on the Line Driver may be configured as DTE Data Terminal Equipment for connection to DCE such as a modem or multiplexor When connecting the X 21 interface of the Line Driver to your DTE device use a X 21 straight through cable see Figure 4 4 Figure 4 4 Connecting the Line Dr...

Страница 18: ...Figure 4 5 Opening the case with a small screwdriver The DCE DTE strap is located on the top side of the Line Driver s PC board see Figure 4 6 The arrows on the top of the strap indicate the configuration of the X 21 port for example if the DCE arrows are pointing toward the DB15 connector the X 21 port is wired as a DCE Change the DCE DTE orientation by pulling the strap out of its socket rotatin...

Страница 19: ...V The power supply has a male IEC 320 power entry connector Connect the power supply to the Line Driver via a barrel jack on the rear panel The Line Driver powers up as soon as it is plugged into an AC outlet there is no power switch WARNING There are no user serviceable parts in the power supply Only qualified service personnel should replace the fuse Contact Black Box Technical Support at 724 74...

Страница 20: ... panel LEDs that monitor power the DTE signals network connection and test modes Figure 5 1 shows the location of each LED Following Figure 5 1 is a description of each LED s function Figure 5 1 Front panel DSL Link Active Green Solid green On indicates that the end to end DSL framer link is up signifying that the link across the DSL span is active The DSL Link LED is Off when the link is down TD ...

Страница 21: ...ket is received from the Managed Micro Rack SNMP HTTP Card part number RM261C SNMP 5 3 Test Modes The Line Driver offers two proprietary loopback test modes plus a built in V 52 BER test pattern generator to evaluate the condition of the modems and the communication link These tests can be activated physically from the front panel or via the DTE interface 5 3 1 OVERVIEW Figure 5 2 shows the major ...

Страница 22: ...nk the far end will begin receiving unframed packets and assume that the line has gone down During test modes we force the pattern generator to time out before it can cause the link to be killed Loop Control This part of the processor is used to control loopbacks In a local loop the data is looped back towards the local DTE In a remote loop the data is looped back to the line but it is also allowe...

Страница 23: ...D PATTERNS The following section describes the Test Modes used in the Line Driver At the bottom of each test mode a figure is included to show the data path Local Loop There are two different modes of operation for a local loop depending on the status of the units at the time that the local loop is initiated If the units are not linked NS LED on and the local loop is initiated either by the front ...

Страница 24: ...ce two separate loop paths will be started In the first path data presented to the local DTE interface will be looped back to the local DTE within the framer In the second path data presented at the far end DTE will be transmitted to the local DTE and then looped back within the local DTE loop control block with the processor After the Local Loop is deselected the units will be placed back into da...

Страница 25: ...during a local loop the restart procedure is set to one minute but the 511 511E pattern will time out after 45 seconds allowing the framer to begin seeing framed packets and not restart the box After the 511 511E pattern times out the ER LED will begin flashing It will remain this way until the pattern generator switch is turned off Note that the data at the local DTE and the remote DTE are not va...

Страница 26: ...plained in the RDL with 511 511E section If the line is disconnected the local unit will restart NS LED activated after 4 6 seconds but the Remote unit will wait for one minute before it Restarts Note that the transmit data at the remote DTE is ignored When the switch is thrown or the DTE removes the RDL request the local unit will transmit an RDL_OFF request to the remote unit The local unit will...

Страница 27: ...enerators When the units enter data mode you can turn on the pattern generators on both ends of the link Once a 511 511E pattern is selected on one end of the link the pattern generator will begin transmitting unframed 511 511E through the line to the remote end A possible problem with this test can occur due to the restart procedure Once the local 511 511E is turned on the remote unit begins rece...

Страница 28: ...ating the 511E test with errors present If the test is working properly the local modem s red ER LED will glow A successful 511E test will confirm that the link is in place and that the Line Driver s built in 511 generator and detector are working properly NOTE The above V 52 BER tests can be used independently of the remote digital loopback tests This requires two operators one to initiate and mo...

Страница 29: ...ady DCE Source F CD Carrier Detect DCE Source H DTR Data Terminal Ready DTE Source L LLB Local Line Loop DTE Source M TM Test Mode DTE Source N RDL Remote Digital Loop DTE Source P TD Transmit Data DTE Source R RD Receive Data DCE Source S TD Transmit Data B DTE Source T RD Receive Data B DCE Source U XTC External Transmit Clock DTE Source V RC Receiver Clock DCE Source W XTC External Transmit Clo...

Страница 30: ...rame Ground 2 T Transmit Data A DTE Source 3 C Control A DTE Source 4 R Receive Data A DCE Source 5 I Indication A DCE Source 6 S Signal Element Timing A DCE Source 7 BT Byte Timing A DCE Source 8 SGND Signal Ground 9 T Transmit Data B DTE Source 10 C Control B DTE Source 11 R Receive Data B DCE Source 12 I Indication B DCE Source 13 S Signal Element Timing B DCE Source 14 BT Byte Timing B DCE Sou...

Страница 31: ...4 576 640 13 500 2 6 4 1 18 000 3 4 5 5 704 768 1040 832 896 11 900 2 2 3 6 15 500 2 9 4 7 960 1024 1168 1088 1152 11 000 2 1 3 3 15 200 2 9 4 6 Table C 2 Transmission distance HDSL Line Driver crosstalk 49 adjacent CAP pairs Line Rate DTE Rates 26 AWG 0 4 mm 24 AWG 0 5 mm kbps kbps ft mi km ft mi km 144 64 128 18 600 3 5 5 7 22 100 4 2 6 7 272 192 256 15 700 3 4 8 21 800 4 1 6 6 400 320 384 12 80...

Страница 32: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 2001 Black Box Corporation All rights reserved ...

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